Weft feeding shuttle for automatic looms



Sept. 11, 1934. A. T. PUJOL WEFT FEEDING SHUTTLE FORYAUTOMATIC LOOMS Filed Oct. 30, 1931 2 shegts-sheet Ill 7 511 704? A. 77PUVOL Sept. 11, 1934.

WEFT FEEDING SHUTTLE FOR AUTOMATIC LOOMS Filed Oct. 30, 1931 2 Sheets-Sheet 2 H r K :9 1 f7 737 f //fl INVE/VVT QR A. 7. Pyuaz A. T. PUJOL 1,973,356

Patented Sept. 11, 1934 f UNE "STATE i PATENT" GF Application October so, 1931, Serial No. 572,119

In Spain October 30,1930 T' i 3 Claims. (01. 139-.-223) The present invention relates to weft feeding shuttles for automatic looms and has for its object to provide improved self threading means in such shuttles. V

The shuttles for automatic looms hitherto known are usually provided with outwardly projecting guides such ascurled wire guides which are of different forms and systems according to their origin and construction, but which all serve substantially the same purpose, i. e. to introduce into the shuttle eye the thread of the newly inserted cop. As will be understood theco-relation between a piece of wood such as the shuttle and another of metal possesses in no sense an equivalent united strength and in addition to the fact that the whole of its strength is less, the picking which the shuttle receives in iiighting it through the shed conduce to the deterioration of the metallic guides and thereof. Y

The connection between the wooden shuttle and the metallic guides is never-perfect and furthermore after the shuttle has beenin use fora prolonged period, the wood wears away more rapidly than the metal which-causes the formation of extraneous projections on which the thread catches and breaks.

These disadvantages andmany others which arise in practice are obviated in the present in- .vention by the use of pins or spikes which" are arranged in the shuttle to function as thread retaining guides which prevent the unthreading of the shuttle and produce the automatic threading thereof. 1

According to this invention in a weft feeding shuttle for an automatic loom the self threading arrangement comprises intersecting thread guiding grooves formed in the body of the shuttie, and one or more associated thread guiding and retaining members all of which project inwardly into the said shuttle body.

In order that the invention may be better understood several constructional embodiments will now be described with reference to the ac companying drawings in which:

Fig. 1 shows in plan View an automatic self threading shuttle constructed according to this invention.

Fig. 1a shows in plan view (to a larger scale) the self threading end of the automatic weft feeding shuttle according to this invention.

Fig. 2 is a view taken at right angles to that shown in Fig. 1.

Fig. 3 is a sectional view taken on line III-III of Fig. 1a.

disarrangement of the setting" Fig. 4 is a sectional view taken on line IV-IV of Fig. 2.

Fig. 5 is a cross sectional V-V of Fig. 1, while i Figs. 6, '7 and 8 are fragmentary plan views of modified arrangements of the self threading shuttle according to this invention.

As shown in Fig.1, the shuttle comprises the usual tip ended body A provided with a cop pocket or slot 411 with which is associated at one end thereof, the cop retaining clips or springs C. The cop D is held by the said clips and the thread thereof leads to the self threading end of the shuttle. i

Referring to Figs. 1, 1a and 2, the self threading end of the "shuttle comprises a longitudinal groove 4 having substantially vertical walls and extending from the cop pocket 4a towards the tapered extremity of the'shuttle and joining a second-longitudinal groove 2 which extends to some extent down and around the outer surface of the shuttle; A downwardly extending groove 5 joinsthe groove 2 and forms a curved passage (Fig. 3) leading to the shuttle eye '7 (Figs. 1,1aand4).-

A metal pin or spikel inset into the shuttle at an angle to both the horizontal and vertical planes thereof extends across the groove 2 and has its free extremity projecting slightly into a recess 3 formed in one wall of the groove 2.

Vertically" inset pins l3 and 14 are positioned one to each side of the flared opening of the eye 7 and a similarly insetvertical pin 12 is positioned at the junction of the grooves 4 and 5.

Horizontally inset pins 8 and 9 extend across the groove 4 and a downwardly curved inset pin 10 also extends across the groove 4.

The pin 11 provided with a curved thread catching extremity is set athwart the groove 5.

In the modifications shown in Figs. 6, 7 and 8, the curved inclined face 6 of the shuttle is somewhat. abbreviated and has an inwardly curved metallic member P secured thereto. The operation of the device is as follows:

Above the pin 1 (Fig. 1) the thread of the newly inserted cop is positioned at the moment when the first flight of the newly charged shuttle is made through the shed. In this movement, due to the groove 2, the thread, which at this part is situated in front of the recess 3, runs to the end of the shuttle and enters a slight distance into the recess thus permitting the thread to pass between the side of the groove 4 and the pin owing to the fact that the latter is situated on a higher level than the weft cop view taken on line" and therefore the thread has a tendency to drop the level of the weft cop thus effecting the first part of the threading operation and the thread thus remains in the groove 4 beneath the pin 1.

When the shuttle receives the second pick after the cop change-over, the thread lifts out of the groove 2 but is met by the pin 1 which owing to having entered the recess 3 and passed under the pin 1 a short way does not allow the thread to move out of the groove 4 and compels it to slide along the pin 1 to the groove 5. Owing-to the construction of the curved face 6, which is open at the end, the groove 4 communicates with the groove 5 and guides the thread to the latter. The inclination of the upper part of the groove 5 causes the thread to enter completely and finally emerge from the shuttle eye '7 so effec'tingthe complete threading of the shuttle in an extremely simple manner.

During the movement of the shutt1e,the thread will slip downwardly over the curved pin 10 and lodge between this and the pins or spikes 8, 9.

These pins serve to diminish the extent of the movement of the thread in the groove 4 during the rotary movement of the shuttle and prevent the thread from wearing excessively against the wooden sides of the groove 4. These pins may be dispensed with, increased in number or changed as to position and shape according to the purpose for which they are to be used and the nature of the work.

The pin 11 inserted in the curved face 6 prevents the thread rrom jumping out of the groove 5 once it has been threaded into it, this pin may also be dispensed with or a plurality of such pins used and their position and distribution may be varied. v

The pin 12 serves to prevent the thread from wearing against the wood in the angle formed by the grooves 4 and 5 at the back of the curved face 6 of the shuttle. 1

The pins 13 and 14 act as thread guides to obviate the wear which the thread would be subjected to on issuing from the hole '7.

For certain kinds of work the pin 1 may be replaced by a small metal bar or wire P as shown in Figures 6, '7 and 8 thus reducing the length of and reenforcing the extremity of the inclined face 5 or the shuttle. V I

The advantages of this mode of construction of the shuttles are many and among others which may be cited the principal one is economy, the suppression of the commonly used curled thread guides and the supporting screw therefor, thus reducing the cost of production of the shuttle.

The strength of the shuttle is increased as it consists entirely of one mass without joints especially owing to the suppression of the supporting screw which weakens and renders liable to maladjustment the self threading fitment.

The improvement also simplifies the work of flighting the shuttle since it avoids the formation of loom fly or fluif which chokes up the grooves, and causes frequent breakage of the thread when thecurled wire or other outwardly projecting guides are used.

The above specifically described embodiments are merelyby way of example and the invention is not limited thereto but may be applied to any arrangement of self-threading grooves and inset guiding members held to fall within the ambit of the appended claims.

I claim:

1. A self-threading weft feeding shuttle, comprising in combination, a shuttle body having a cop pocket and a thread-eye provided therein, cop retaining spring-clips associated with said pocket, a longitudinal thread guiding groove extending from said cop pocket and having a recess in one vertical wall thereof, a second longitudinal groove joining said first groove and extending laterally to one side or" said shuttle, a third thread-guiding groove joining said second groove and extending to said thread-eye, a thread retaining member inset into said shuttle body and extending across said first groove to project into the recess formed in said groove-wall, thread: guiding members inset into said shuttle body and adapted to receive the thread fed through the thread-eye, a-further thread retaining member inset into said shuttle body and extending across said third groove, a further threadguiding member insetinto the said shuttle body at the point of intersection of the second and third grooves and further thread-retaining and guiding members associated with said first groove.

, 2. A self-threading weft feeding shuttle as claimed in claim 1, wherein the thread retaining and guiding members comprise shuttle spikes rigidly inset into theshuttle body and extending inwards thereof.

3. A self-threading weft feeding shuttle as claimed in claim 1, wherein the thread retaining member extending across the said first thread guiding groove comprises a metal plate secured to the outer surface of the said shuttle body and curving inwardly into the said groove.

AVELINO TRINXE'I PUJOL. 

